CN101687083B - Syringe having a hinged needle shield - Google Patents

Syringe having a hinged needle shield Download PDF

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Publication number
CN101687083B
CN101687083B CN2008800119668A CN200880011966A CN101687083B CN 101687083 B CN101687083 B CN 101687083B CN 2008800119668 A CN2008800119668 A CN 2008800119668A CN 200880011966 A CN200880011966 A CN 200880011966A CN 101687083 B CN101687083 B CN 101687083B
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CN
China
Prior art keywords
needle shield
collar
pin
needle
protective position
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Active
Application number
CN2008800119668A
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Chinese (zh)
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CN101687083A (en
Inventor
林健兴
C·E·加德纳
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Becton Dickinson and Co
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Becton Dickinson and Co
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Publication of CN101687083A publication Critical patent/CN101687083A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3216—Caps placed transversally onto the needle, e.g. pivotally attached to the needle base
    • A61M2005/3217—Means to impede repositioning of protection cap from needle covering to needle uncovering position, e.g. catch mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps

Abstract

A syringe assembly (20) includes a syringe barrel (21) having an elongate body (22), a tip (31) on its distal end surrounded by a barrel collar (33). A needle assembly includes a needle cannula (38) attached to a hub (43) hav ing a cavity in its open proximal end. The hub is attached to the barrel wit h the barrel tip in the hub cavity. A plunger (49) having a stopper (55) pos itioned in fluid tight engagement on the inside (23) of the barrel. A collar (58) is rotatably connected to the outside surface of the barrel collar. An elongate needle shield (57) is hingedly connected to the collar. The needle shield includes two side walls (61,62) defining a longitudinal opening (63) and a recess (65). A needle shield is capable of pivoting about the collar from an open position (Fig 3) to a closed position (Fig 11) wherein the dist al end of the needle cannula is in the recess of the needle shield. Structur e (69) is provided to lock the needle shield to the collar and to trap the n eedle cannula in the needle shield when the needle shield is in the closed p osition. Structure (74,79) is provided to prevent over- rotation of the need le shield past the needle protecting position and to guide a needle cannula into the recess of the needle shield. An over-center hinge (80) facilitates moving the needle shield to the closed position.

Description

Syringe with hinged needle shield
Technical field
The present invention relates in general to the signal use syringe with security feature, specifically, the present invention relates to a kind of have hinged needle assembly and for syringe the syringe of hinged needle shield assembly.
Background technology
The new accidental needle sticks bundle that does not use pin can cause injury, and makes pin be unsuitable for being used further.The accidental needle sticks of used pin is pricked can communicate illness.Thereby the most prior art needle assembly has needle shield.Some prior art needle shields limit rigid sleeve, and this rigid sleeve can manually stretch on pin intubation.This excessively one of range request health care worker holds syringe barrel and another holds sheath.Some medical procedures require to exert pressure for thrusting the position after extracting pin.Thereby health care worker usually can not be come pin intubation is shielded with two handss.In these cases, the staff have to be put on the nigh surface with the medical apparatus and instruments of crossing, to the time is shielded more easily.Yet, until the pin conductively-closed or suitably dispose before, all will there be potential harm in it for other personnel.
Near the advantage that hinged needle shield has the pin pedestal is: allow a hands to carry out pin and again shield.Thereby in most of the cases, tightly after using, the chance that is provided for again shielding.Correspondingly, developed the multiple prior art needle shield assembly that comprises such needle shield.
Various devices are provided, be used for hinged needle shield be locked in sealing, in the pin protective position.But deflection component has been provided in the needle shield, is used at when shielding joint pin and prevent from the shielding of pin is opened afterwards.Such parts are arrested limit in needle shield with pin.Engage with near the locking of the structure pin pedestal by needle shield, also realized locking.
Although hinged needle shield is known in the prior art, but still exist the needs for a kind of so improved hinged needle shield: can automatically lock, cost economy, easy to manufacture and have an improved security feature.
Summary of the invention
A kind of injector assembly, comprise syringe barrel, this syringe barrel has elongate body, outer surface, reaches open proximal end and far-end, and this elongate body limits the chamber that is used for keeping fluid, this far-end comprises end, and this end has the path with chamber in fluid communication.Far-end also comprises with one heart around terminal barrel collar.Needle assembly comprises pin intubation and hub seat, this pin intubation has near-end, far-end and runs through wherein inner chamber, and this hub seat has open proximal end and far-end, and this open proximal end comprises cavity therein, this far-end is attached on the near-end of pin intubation, thereby the inner chamber of pin intubation is communicated with the layer Cavity Flow of hub seat.Needle assembly removably is attached on the syringe barrel by the cavity in the hub seat and the frictional engagement of the end on bobbin.Plunger comprises the elongate body part, this elongate body partly has nearly section, distal part and block, this block is positioned to the inner surface fluid-tight engagement with bobbin slidably, is used for fluid being drawn in the chamber and with fluid drives with respect to the motion of bobbin by block going out chamber.The elongate body part stretches out from the open end of syringe barrel.The collar is pivotally connected on the outer surface of barrel collar.Microscler needle shield is connected on the collar in hinged way.Needle shield comprises two sidewalls and the rear wall between two sidewalls that limits longitudinal opening, and two sidewalls and rear wall limit the recess with inner surface.Needle shield can be pivoted to the anesthesia needle protective position from open position, in this open position, and the exposed needle intubate, in this anesthesia needle protective position, the far-end of pin intubation is in the longitudinal opening of sheath.Provide when needle shield is pivoted to detent position needle shield is locked in the structure in the anesthesia needle protective position.Structure comprises the arm that stretches out from the inner surface of needle shield.Arm has free end, and this free end is positioned to when needle shield is pivoted to detent position, and free end is crossed in the pin intubation motion, and is arrested limit in needle shield by arm.The structure that is used for locking also is included in the locking projection on the far-end of needle shield, is used for being bonded on when needle shield is pivoted to detent position the ledge on the collar with locking.Be positioned at the outthrust of needle shield far-end in recess, when needle shield is pivoted to detent position and the hub seated connection touch, cross the pin protective position to help prevent the needle shield inordinate rotation.Be provided at the fin on each of sidewall at longitudinal opening place of needle shield.Fin has the oriented surface, and these oriented surfaces are assembled to longitudinal opening, are used for when needle shield is pivoted to detent position pin intubation being directed in the longitudinal opening.Spring structure connects the collar and needle shield, is used for promoting needle shield towards the anesthesia needle protective position.
Injector assembly can also comprise rigid elongate pin lid, and this rigid elongate pin lid has far-end and open proximal end, reaches the sidewall between them, and this far-end, near-end and sidewall limit cavity volume.The pin lid removably engages with the hub seat, and comprises pin intubation, is used for protecting pin intubation before syringe is used for injection and prevents that elongate needle shield is in the accident location of detent position.
Outthrust in the recess of needle shield can be taked other shape, such as the cross rib that extends between each sidewall of needle shield or the cross rib with horizontal hub seat guide surface.
Needle shield can comprise two reinforced walls, and each reinforced wall stretches abreast in one of sidewall outside, limits wing passage with the outside at the longitudinal opening of needle shield.By means of the needle shield with reinforced wall, fin can be across wing passage, to prevent pin intubation approaching side passage.The spring structure that is used for promoting to detent position needle shield comprises eccentric hinge, and when needle shield during in open position, this eccentric hinge is bias voltage not basically.
Needle shield can be connected on the collar in hinged way by loose-joint butt.
Injector assembly can comprise spring assembly, and this spring assembly comprises eccentric hinge, the proximal extension of this eccentric hinge from the collar to the needle shield.
Needle shield, the collar, loose-joint butt and eccentric hinge can be with the Unitarily molded integrative-structure of thermoplastic.
Locking projection on needle shield can comprise two locking projections, and these two locking projections face with each other, and reach the recess from the sidewall of needle shield.
The barrel collar of syringe barrel can comprise female thread.The hub seat can comprise radial projection at its near-end, is used for engaging the female thread of barrel collar, in order to needle assembly is remained on the bobbin securely.
Block can be made by the material of selecting from a tabulation, and this tabulation comprises thermoplastic elastomer (TPE), natural rubber, synthetic rubber, thermoplastic and combination thereof.
Of the present invention one can select embodiment comprise a kind of for bobbin the needle shield assembly, this bobbin has elongate body, outer surface, open proximal end and far-end, this elongate body limits the chamber that is used for keeping fluid, this far-end comprises end, and barrel collar, this end has the path with chamber in fluid communication, this barrel collar is with one heart around barrel tip, pin intubation has near-end, far-end and run through wherein inner chamber, the hub seat has open proximal end and far-end, this open proximal end comprises cavity therein, this far-end is attached on the near-end of intubate, thereby inner chamber is communicated with layer Cavity Flow.Needle assembly removably is attached on the bobbin by the cavity in the hub seat and the frictional engagement of the end on bobbin.The needle shield assembly comprises the collar, this collar is pivotally connected on the outer surface of barrel collar, elongate needle shield is connected on the collar in hinged way, needle shield comprises two sidewalls and the rear wall between these two sidewalls that limits longitudinal opening,, these sidewalls and rear wall limit the recess with inner surface.Needle shield can be pivoted to the anesthesia needle protective position from open position, in this open position, and the exposed needle intubate, in this anesthesia needle protective position, distal end needle cannula is in the longitudinal opening of sheath.Be used for when needle shield is pivoted to the anesthesia needle protective position needle shield is locked in the structure in the anesthesia needle protective position, comprise the arm that stretches out from the inner surface of needle shield.Arm comprises free end, and this free end is positioned to when needle shield is pivoted to detent position, and free end is crossed in the pin intubation motion, and is arrested limit in needle shield by arm.The structure that is used for locking also is included in the locking projection on the near-end of needle shield, is used for locking when needle shield is pivoted to detent position the ledge that is bonded on the collar.Outthrust in the needle shield proximal end in recess is positioned to, when needle shield is pivoted at detent position and the hub seated connection touch, cross the pin protective position to help prevent the needle shield inordinate rotation.Be provided at the fin on each of sidewall at longitudinal opening place of needle shield.Each fin comprises the oriented surface, and these oriented surfaces are assembled to longitudinal opening, are used for when needle shield is pivoted to detent position pin being directed in the longitudinal opening.The spring structure that is connected on the collar and the needle shield is provided, is used for promoting needle shield towards the anesthesia needle protective position.
Description of drawings
Fig. 1 is the exploded perspective view of injector assembly of the present invention.
Fig. 2 is the axonometric chart of injector assembly of the present invention.
Fig. 3 is the cross-sectional side view of injector assembly of the present invention, and wherein plunger is in the position of injecting.
Fig. 4 is the cross-sectional side view of the injector assembly of Fig. 3, wherein in the position of plunger after injecting.
Fig. 5 is the amplification cross-sectional side view of far-end of the injector assembly of Fig. 4.
Fig. 6 is the side view of needle shield assembly of the present invention.
Fig. 7 is the face upwarding view of the elongate needle shield of Fig. 6.
Fig. 8 is the cross-sectional view of the needle shield of Fig. 7 of obtaining of 8-8 along the line.
Fig. 9 is the cross-sectional view of the needle shield of Fig. 7 of obtaining of 9-9 along the line.
Figure 10 is the face upwarding view of injector assembly of the present invention, is illustrated in the needle shield in the anesthesia needle protective position.
Figure 11 is the cross-sectional view of the injector assembly of Figure 10 of obtaining of 11-11 along the line.
Figure 12 is a kind of face upwarding view of selecting the needle shield assembly of the present invention.
Figure 13 is the face upwarding view of another selected embodiment of needle shield assembly of the present invention.
Figure 14 is the cross-sectional view of the needle shield assembly of Figure 13 of obtaining of 14-14 along the line.
Figure 15 is the cross-sectional view that can select embodiment of elongate needle shield, and this elongate needle shield has the outthrust of bevel-type boss shape.
Figure 16 is the cross-sectional view of another selected embodiment of elongate needle shield assembly of the present invention.This embodiment comprises the outthrust of cross rib form, and this cross rib has the concave needle hub retaining part.
Figure 17 is the cross-sectional view of another selected embodiment of elongate needle shield assembly of the present invention.This embodiment comprises the outthrust of cross rib form, and this cross rib has the concave hub guide surface.
The specific embodiment
Although the present invention is satisfied by multiple multi-form embodiment, in the accompanying drawings expression and will describe the preferred embodiments of the present invention in detail here is appreciated that the disclosure will be used as the demonstration of principle, and does not plan the embodiment that limit the invention to illustrate.Scope of the present invention will be delimited by appending claims and their equivalent way.
With reference to Fig. 1-11, injector assembly 20 of the present invention comprises syringe barrel 21, this syringe barrel 21 has elongate body 22, outer surface 27, open proximal end 28, and far-end 29, this elongate body 22 limits the chamber 23 that is used for keeping fluid 25, far-end 29 comprises end 31, penetratingly is provided with the path with chamber in fluid communication in this end 31.The far-end of bobbin preferably includes with one heart around terminal barrel collar 33.
Needle assembly 37 comprises pin intubation 38 and hub seat 43, and this pin intubation 38 has near-end 39, far-end 40 and runs through wherein inner chamber 41.The hub seat comprises open proximal end 44, and far-end 46, and open proximal end 44 has cavity 45 therein, and far-end 46 is attached on the near-end of pin intubation, thereby inner chamber is communicated with layer Cavity Flow.Needle assembly removably is attached on the bobbin by the cavity in the hub seat and the frictional engagement of the end on bobbin.
Plunger 49 comprises elongate body part 50, this elongate body part 50 has nearly section 51, distal part 52 and block 55, this block 55 is positioned to the inner surface fluid-tight engagement with bobbin slidably, is used for being drawn in the bobbin chamber and with fluid drives with respect to the motion of bobbin and with fluid by block going out the bobbin chamber.The elongate body part stretches out from the open end of bobbin.
Needle shield assembly 57 comprises the collar 58, and this collar 58 is pivotally connected on the outer surface of barrel collar, and is connected in hinged way on the elongate needle shield 61.Needle shield comprises two sidewalls 62 and the rear wall between two sidewalls 64 that defines longitudinal opening 63, defines the recess 65 with inner surface 67.Needle shield is connected on the collar by loose-joint butt 81 in this embodiment.Needle shield can be pivoted to the anesthesia needle protective position from open position, in this open position, and as the clearest illustrating among Fig. 2-5, the exposed needle intubate, in this anesthesia needle protective position, the far-end of pin intubation is in the longitudinal opening of sheath.
When needle shield is pivoted to the pin screening-off position, be used for the needle shield automatic lock on ground is fixed on structure in the pin protective position, in this embodiment, comprise at least one arm 69 that stretches out from the inner surface of needle shield.Arm comprises free end 70, this free-ended location so that: when needle shield is pivoted to detent position, the moved free end of arm of pin intubation, and arrested limit in needle shield by this arm.Be used for the needle shield automatic lock on ground is fixed on locking projection on the near-end that structure in the anesthesia needle protective position also is included in needle shield.In this embodiment, at the near-end of needle shield two locking projections 71 are arranged, be used for when needle shield is pivoted to the anesthesia needle protective position, being bonded on to locking the ledge 73 on the collar.
Rigid elongate pin lid 94 comprises far-end 95, open proximal end 97 and the sidewall between them, and this far-end 95, near-end 97 and sidewall are limited to the cavity volume 99 in the pin lid.Before using, as shown in figure 2, pin lid 94 removably engages with hub seat 43, makes pin intubation 38 in pin lid cavity volume.Preferably, injector assembly in the situation that put in place at pin lid in the protective package is sterilized.After injector assembly was taken out from sterilization wrap, the pin lid provided contamination barrier for pin.Correspondingly, can guarantee that user is using hour hands to clean for the first time.When using for the first time, by overcoming the engaging force between the open proximal end of hub seat and pin lid, cover and remove pin.Pin lid also provides following advantage: when it when the hub seat puts in place, needle shield can not turn to the anesthesia needle protective position.
Be positioned at the outthrust of needle shield far-end in the needle shield recess, contact hub seat is crossed the pin protective position to help prevent the needle shield inordinate rotation when needle shield is pivoted to the anesthesia needle protective position.In this embodiment, outthrust is the cross rib 74 that extends between each sidewall 62 of needle shield, as shown in Figure 9.A key character of the present invention is that needle shield is configured to prevent the inordinate rotation of needle shield when it is pivoted to the anesthesia needle protective position.As can be seeing among Figure 11, cross rib 74 contact pin hub seats 43 be to stop inordinate rotation.Inordinate rotation can make needle shield contact pin intubate, and if use excessive power then make pin crooked.When excessive forces stops, needle shield will be relaxed to its normal position, the sharp end of pin is extended near the longitudinal opening of needle shield or from this outward opening, so that it no longer suitably be protected by needle shield.
Needle shield in this embodiment preferably but not necessarily, comprises two reinforced walls 75, and these two reinforced walls 75 strengthen the rigidity of needle shields.Each reinforced wall 75 stretches abreast in the outside of a sidewall 62, and is limited to the outer wing passage 76 of longitudinal opening of needle shield.The additional width of the needle shield in the zone of reinforced wall provides larger contact surface for user, so that apply finger strength when needle shield is pivoted to detent position.
Fin 77 is connected on each of sidewall 62 at the longitudinal opening place of needle shield.Fin has oriented surface 79, and these oriented surfaces 79 are assembled to the longitudinal opening 63 of needle shield, are used for when needle shield is pivoted to the anesthesia needle protective position pin intubation being directed in the longitudinal opening.Fin with oriented surface is a key character of the present invention, because they help pin is directed in the recess of needle shield, thereby when needle shield during in the anesthesia needle protective position, helps to prevent that pin is positioned at outside the recess.In this embodiment, fin also prevents from being pivoted to detent position hour hands approaching side passage when needle shield.
As the clearest illustrating among Fig. 3, coming to a point of pin intubation 38 terminal 42 comes to a point into inclined plane shape, and this inclined plane shape has skewed surface 48 by the angle A orientation with respect to the longitudinal axis of pin intubation.Skewed surface 48 faces direction B.The collar is a key character of the present invention for being rotationally connected of barrel collar, because it allows needle shield around the rotation of bobbin, thereby skewed surface is in the face of wherein arranging the side of the bobbin of needle shield.Needle shield is to the rotation of this position so that be easier to insert the needle in patient's the blood vessel.Correspondingly, it is desirable for when needle shield to make during in open position skewed surface 48 in the face of the same side of needle assembly with needle shield, thereby when attempting intravasation, needle shield is not interfered the close patient body of syringe, for example, patient's arm, the location.
The needle shield assembly also comprises eccentric hinge assemblies (over-centerhinge assembly) 80; this eccentric hinge assemblies 80 is connected on the collar 58 and the needle shield 61, is used for allowing needle shield to be pivoted to the anesthesia needle protective position and to be used for needle shield is promoted to the anesthesia needle protective position.Specifically, in this embodiment specifically the hinge of loose-joint butt 81 in hinged way the collar is connected on the needle shield.Hinge 81 is basic hinge members of bias voltage (substantially nonbiasinghinge member) not, this not the hinge member of bias voltage limit the rotate path of needle shield from open position to the anesthesia needle protective position.Form eccentric hinge assemblies with the hinge 81 of spring element 82 combinations.Spring element 82 comprises first paragraph 83 and second segment 84 in this preferred embodiment, this first paragraph 83 and second segment 84 are aligned with each other orthogonally under the not bias state shown in Fig. 3-6.Yet, first and second section 83 of spring element 82 and 84 can be flexibly never bias voltage tilt alignment state be deflected more linear alignment.The rotation of needle shield from open position to detent position will the section of making 83 and 84 from the right angle state of expression among Fig. 3-6 to more linear orientation deflection.The user of injector assembly must the artificially overcomes the elastic power owing to spring element 82, so that needle shield moves to the centre position between open position and detent position.Elasticity intrinsic in spring element 82 will push back the spring section to undeflected right angle state.This elasticity will advance needle shield effectively to the anesthesia needle protective position.The self-propelled attribute of eccentric hinge meets expectation for realizing for a hands shielding needle.The following fact also is important, and spring element 82 is in steady statue in the orientation shown in Fig. 3-6, in fact pressure is not applied to the stored energy on the plastic components of needle shield assembly.Acting on stored energy on the plastics can affect reliability and the performance of part.Yet, in this example, only just accumulation after needle shield rotates from open position to detent position of stored energy.Then the energy of accumulation promotes needle shield by the anesthesia needle protective position to Figure 11 is the user acting.When spring element 82 is worked as in the detent position shown in Figure 11, with preferably stable, considerably less stored energy preferably arranged or do not have stored energy.In this embodiment, needle shield, the collar, loose-joint butt and spring element are by the Unitarily molded integrative-structure of thermoplastic.
Regrettably, sometimes needing most the people of the benefit of the injector assembly with pin protection feature, is the people that can not bear such protection.All the more so for the popular immune programme for children in undeveloped country.The lower price product allows for these program buying more products.Needle shield assembly of the present invention, having the cross rib of the inordinate rotation of preventing and fin-these fins has pin is directed to oriented surface in the recess that enters needle shield in the pin intubation, allow the needle shield assembly to make with less plastics, thereby also corresponding reduction of price, because plastic material is the main determining factor of components in high volume products price.When using less plastics, the needle shield assembly may be less rigidity, and if user excessive finger pressure is applied on the needle shield so that it is turned to detent position then may deflection.This finger pressure can make needle shield and/or to the left or to the right deflection of the hinge between needle shield and the collar, wherein pin may be avoided cavity and/or the inordinate rotation in sheath, and make sheath deflection, this can make pin crooked, makes it outstanding from the longitudinal opening of needle shield.Fin with oriented surface compensates left and deflection to the right, and cross rib compensates inordinate rotation possible when needle shield is moved to detent position.Correspondingly, compare with other possible mode, the needle shield with character of innovation of the present embodiment can adopt plastic material still less to make, and can sell more at an easy rate, is benefited from the security feature of needle shield assembly to allow more people.
Preferably, barrel collar comprises female thread 34, and the hub seat comprises engaging the radial projection 47 of female thread 34 at its near-end, in order to needle assembly is remained on the bobbin securely.In order with these new elements needle assembly to be attached on the bobbin, user is placed on pin hub seat cavity on the barrel tip, thereby the radial projection 47 on the hub seat engages with screw thread 34 in barrel collar.Then needle assembly revolves or is screwed on the locking collar, thereby by interaction and the frictional interference between the cavity 45 of the end 31 on the bobbin and hub seat of screw thread and projection, needle assembly is closely remained on the far-end of syringe barrel.Within the scope of the present invention be, comprise such needle assembly, this needle assembly has one-piece construction, its middle bobbin and hub seat are formed by single-piece, and pin intubation directly is attached on the hub seat part of bobbin, and do not use removable hub seat.
Preferred but optionally be: block is the resolution element that is attached on the elongate body part of plunger, and it is made by the material of selecting from tabulation, and this tabulation comprises thermoplastic elastomer (TPE), natural rubber, synthetic rubber, thermoplastic and their combination.Also within the scope of the present invention be, have the single-piece plunger, wherein block and plunger rod integrally form.
In operation, injector assembly can use the known safe process to fill from little ampoule or other appropriate containers.Syringe is filled by being inserted into pin intubation in the bottle and returning plunger 49.This will make liquid be pumped in the inner chamber of pin intubation and enter in the chamber 23, as being most clearly shown among Fig. 3.Fluid 25 in chamber 23 may be injected among the patient body now, perhaps carries with another kind of appropriate ways, as passes the barrier film that stings of catheter extension.This is by being applied to axial force on the thumb press 53 so that plunger 49 front and then generation in bobbin is discharged fluid by the inner chamber of pin intubation thus.At the place that finishes of injection process, plunger is as being positioned shown in Fig. 4-5.User then available one hold syringe barrel and apply finger strength, as by thumb, so that needle shield is turned to the centre position from open position, wherein eccentric hinge is energized, and needle shield will advance to the anesthesia needle protective position.Other power may be essential for user, so that needle shield is locked in the anesthesia needle protective position.In this position, pin intubation is remained in the sheath by arm 69, and needle shield is locked in the detent position by the effect at the joint of the locking projection 71 on the needle shield and the ledge on the collar 73, as shown in Figure 10 and 11.
Figure 12 illustrates one of the present invention can select embodiment.This embodiment cardinal principle works with the embodiment of Fig. 1-11 similarly.Can select among the embodiment at this, needle shield assembly 157 comprises elongate needle shield 161, and this elongate needle shield 161 is connected on the collar in hinged way.Needle shield comprises two sidewalls 162 and the rear wall 164 between these two sidewalls 162 that limits longitudinal opening 163, and they limit recess 165 jointly.A plurality of fins, six fins 177 have the guide surface 179 of assembling to the longitudinal opening 163 of needle shield in this case, are used for when needle shield is pivoted to the anesthesia needle protective position pin intubation being directed in the longitudinal opening.
Figure 13 and 14 illustrates of the present invention another can select embodiment.This embodiment cardinal principle works with the embodiment of Fig. 1-11 similarly.Can select among the embodiment at this, needle shield assembly 257 comprises elongate needle shield 261, and this elongate needle shield 261 is connected on the collar in hinged way.Needle shield comprises two sidewalls 262 and the rear wall 264 between these two sidewalls 262 that limits longitudinal opening 263, and they limit recess 265 jointly.A plurality of fins, two fins 277 have the guide surface 279 of assembling to the longitudinal opening 263 of needle shield in this case, are used for when needle shield is pivoted to the anesthesia needle protective position pin intubation being directed in the longitudinal opening.In this embodiment, fin stretches out and surmounts wing passage, forms long guide surface 279, comprising quickly pin, and is provided for the more shallow angle of guide surface, with more suddenly to recess guide pin intubate.
Figure 15 illustrates of elongate needle shield of the present invention can select embodiment.In this embodiment, elongate needle shield 361 comprises two sidewalls 362 and the rear wall 364 between these two sidewalls 362 that defines longitudinal opening 363, their common recesses 365 with inner surface 367 that limits.The outthrust 374 of cone boss form is outstanding from inner surface 367, and is positioned to contact hub seat when needle shield is pivoted to the anesthesia needle protective position, crosses the pin protective position to help prevent the needle shield inordinate rotation.
Figure 16 illustrates another selected embodiment of elongate needle shield of the present invention.In this embodiment, elongate needle shield 461 comprises two sidewalls 462 and the rear wall 464 between these two sidewalls 462 that defines longitudinal opening 463,, their common recesses 465 with inner surface 467 that limits.Form with hub seated connection receipts recess 478 is that the outthrust of cross rib 474 is outstanding from inner surface 467, and is positioned to contact hub seat when needle shield is pivoted to the anesthesia needle protective position, crosses the pin protective position to help prevent the needle shield inordinate rotation.
Figure 17 illustrates another selected embodiment of elongate needle shield of the present invention.In this embodiment, elongate needle shield 561 comprises two sidewalls 562 and the rear wall 564 between these two sidewalls 562 that defines longitudinal opening 563, their common recesses 565 with inner surface 567 that limits.Form with concave hub guide surface 578 is that the outthrust of cross rib 574 is outstanding from inner surface 567, and is positioned to contact hub seat when needle shield is pivoted to the anesthesia needle protective position, crosses the pin protective position to help prevent the needle shield inordinate rotation.Recessed hub seat guide surface is to meet very much expectation, because it helps to compensate the excessive forces that is applied on the needle shield, this excessive forces can make the recess 565 in the needle shield form deviation of the alignment with respect to pin intubation.Specifically, concave hub guide surface with needle shield of deviation of the alignment will earlier contact the hub seat in this needle shield enters rotation in the detent position, to help to center guide pin sheath, compare with the cross rib that employing is straight, in this needle shield, pin intubation enters manyly to the center of recess 565.

Claims (22)

1. injector assembly comprises:
Syringe barrel, have elongate body, outer surface, open proximal end and far-end, this elongate body limits the chamber that is used for keeping fluid, and this far-end comprises end, this end has the path with described chamber in fluid communication, and described far-end also comprises the barrel collar that centers on one heart described end;
Needle assembly, comprise pin intubation and hub seat, this pin intubation has near-end, far-end and runs through wherein inner chamber, this hub seat has open proximal end and far-end, this open proximal end comprises cavity therein, and this far-end is attached on the described near-end of described pin intubation, thereby described inner chamber is communicated with described layer Cavity Flow, described needle assembly removably is attached on the described bobbin by the described cavity in described hub seat and the frictional engagement of described end;
Plunger, comprise the elongate body part, this elongate body partly has nearly section, distal part and block, this block is positioned to the inner surface fluid-tight engagement with described bobbin slidably, be used for fluid being drawn in the described chamber and with fluid drives with respect to the motion of described bobbin by described block and go out described chamber, described elongate body part stretches out from the described open proximal end of described bobbin;
The collar is pivotally connected on the described outer surface at described barrel collar place;
Microscler needle shield, be connected in hinged way on the described collar, described needle shield has two sidewalls and the rear wall between described two sidewalls that limits longitudinal opening, described two sidewalls and described rear wall limit the recess with inner surface, described needle shield can be pivoted to from open position the pin protective position of sealing, in open position, exposes described pin intubation, in the anesthesia needle protective position, the described far-end of described pin intubation is in the described longitudinal opening of described needle shield;
Two reinforced walls, each reinforced wall stretches abreast in one of described sidewall outside, limits wing passage with the outside at the described longitudinal opening of described needle shield;
Be used for when described needle shield is pivoted to described pin protective position described needle shield is locked in the device in the described pin protective position, comprise the arm that stretches out from the described inner surface of described needle shield, described arm has free end, described free end is positioned to, when described needle shield is pivoted to described pin protective position, described free end is crossed in described pin intubation motion, and arrested limit in described needle shield by described arm, described device for locking also is included in the locking projection on the near-end of described needle shield, is used for being bonded on when described needle shield is pivoted to described pin protective position the ledge on the described collar with locking;
Outthrust, in the described recess of the described proximal end of described needle shield, described outthrust is positioned to when described needle shield is pivoted to described pin protective position and described hub seated connection touches, and crosses described pin protective position to help prevent described needle shield inordinate rotation;
Fin, on each of the described sidewall at described longitudinal opening place, described fin across described wing passage to prevent described pin intubation and enter described wing passage and described fin has the oriented surface, these oriented surfaces are assembled to described longitudinal opening, are used for when described needle shield is pivoted to described pin protective position described pin intubation being directed in the described longitudinal opening; And
Spring assembly is connected on the described collar and the described needle shield, is used for promoting described needle shield towards described pin protective position.
2. injector assembly according to claim 1, also comprise rigid elongate pin lid, this rigid elongate pin lid has far-end and open proximal end, reaches the sidewall between them, this far-end, near-end and sidewall limit cavity volume, described pin lid removably engages with described hub seat, and comprises described pin intubation in described cavity volume.
3. injector assembly according to claim 1, wherein, described outthrust is the cross rib that extends between described two sidewalls of described needle shield.
4. injector assembly according to claim 1, wherein, described outthrust is the cross rib with concave hub guide surface.
5. injector assembly according to claim 1, wherein, when described needle shield during in described open position, described spring assembly is bias voltage not basically.
6. injector assembly according to claim 1, wherein, described needle shield is connected on the described collar in hinged way by loose-joint butt.
7. injector assembly according to claim 6, wherein, described spring assembly comprises eccentric hinge, the described proximal extension of this eccentric hinge from the described collar to described needle shield.
8. injector assembly according to claim 7, wherein, described needle shield, the described collar, described loose-joint butt and described eccentric hinge are by the Unitarily molded integrative-structure of thermoplastic.
9. injector assembly according to claim 1, wherein, described locking projection comprises two locking projections, these two locking projections face with each other, and reach the described recess from described sidewall.
10. injector assembly according to claim 1, wherein, described barrel collar comprises female thread.
11. injector assembly according to claim 10, wherein, described hub seat comprises radial projection at its near-end, is used for engaging described screw thread, in order to described needle assembly is remained on the described bobbin securely.
12. injector assembly according to claim 1, wherein, described block is made by natural rubber or synthetic rubber or its combination.
13. injector assembly according to claim 1, wherein, described block is made by thermoplastic.
14. injector assembly according to claim 1, wherein, described block is made by thermoplastic elastomer (TPE).
15. one kind for bobbin and needle assembly the needle shield assembly, this bobbin has elongate body, outer surface, open proximal end and far-end, this elongate body limits the chamber that is used for keeping fluid, this far-end comprises end, this end has the path with described chamber in fluid communication, described far-end also comprises barrel collar, and this barrel collar is with one heart around described end; This needle assembly comprises pin intubation and hub seat, this pin intubation has near-end, far-end and runs through wherein inner chamber, this hub seat has open proximal end and far-end, this open proximal end comprises cavity therein, this far-end is attached on the described near-end of described intubate, thereby described inner chamber is communicated with described layer Cavity Flow, and described needle assembly removably is attached on the described bobbin by the frictional engagement of the described cavity in described hub seat and described end, and described needle shield assembly comprises:
The collar is pivotally connected on the described outer surface at described barrel collar place;
Microscler needle shield, be connected in hinged way on the described collar, described needle shield has two sidewalls and the rear wall between described two sidewalls that limits longitudinal opening, described two sidewalls and rear wall limit the recess with inner surface, described needle shield can be pivoted to from open position the pin protective position of sealing, in open position, exposes described pin intubation, in the anesthesia needle protective position, the described far-end of described pin intubation is in the described longitudinal opening of described needle shield;
Two reinforced walls, each reinforced wall stretches abreast in one of described sidewall outside, limits wing passage with the outside at the described longitudinal opening of described needle shield;
Be used for when described needle shield is pivoted to described pin protective position described needle shield is locked in the device in the described pin protective position, comprise the arm that stretches out from the described inner surface of described needle shield, described arm has free end, this free end is positioned to when described needle shield is pivoted to described pin protective position, described free end is crossed in described pin intubation motion, and arrested limit in described needle shield by described arm, described device for locking also is included in the locking projection on the near-end of described needle shield, is used for locking when described needle shield is pivoted to described pin protective position the ledge that is bonded on the described collar;
Outthrust, in the described recess of the described proximal end of described needle shield, described outthrust is positioned to when described needle shield is pivoted to described pin protective position and described hub seated connection touches, and crosses described pin protective position to help prevent described needle shield inordinate rotation;
Fin, be on each of described sidewall at described longitudinal opening, described fin across described wing passage to prevent described pin intubation and enter described wing passage and described fin has the oriented surface, these oriented surfaces are assembled to described longitudinal opening, are used for when described needle shield is pivoted to described pin protective position described pin intubation being directed in the described longitudinal opening; And
Spring assembly is connected on the described collar and the described needle shield, is used for promoting described needle shield towards described pin protective position.
16. needle shield assembly according to claim 15, wherein, described outthrust is the cross rib that extends between described two sidewalls of described needle shield.
17. needle shield assembly according to claim 15, wherein, described outthrust is the cross rib with concave hub guide surface.
18. needle shield assembly according to claim 15, wherein, when described needle shield during in described open position, described spring assembly is bias voltage not basically.
19. needle shield assembly according to claim 15, wherein, described needle shield is connected on the described collar in hinged way by loose-joint butt.
20. needle shield assembly according to claim 19, wherein, described spring assembly comprises eccentric hinge, the described proximal extension of this eccentric hinge from the described collar to described needle shield.
21. needle shield assembly according to claim 20, wherein, described needle shield, the described collar, described loose-joint butt and described eccentric hinge are by the Unitarily molded integrative-structure of thermoplastic.
22. needle shield assembly according to claim 15, wherein, described locking projection comprises two locking projections, and these two locking projections face with each other, and reach the described recess from described sidewall.
CN2008800119668A 2007-02-26 2008-02-25 Syringe having a hinged needle shield Active CN101687083B (en)

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US11/678,739 US8038654B2 (en) 2007-02-26 2007-02-26 Syringe having a hinged needle shield
US11/678,739 2007-02-26
PCT/US2008/054873 WO2008106398A2 (en) 2007-02-26 2008-02-25 Syringe having a hinged needle shield

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EP (2) EP2131901B1 (en)
CN (1) CN101687083B (en)
BR (1) BRPI0807374B8 (en)
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ES (2) ES2560670T3 (en)
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US20080208138A1 (en) 2008-08-28
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US8038654B2 (en) 2011-10-18
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BRPI0807374B1 (en) 2018-11-06
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CA2678882A1 (en) 2008-09-04
CA2678882C (en) 2015-05-26
EP2131901B1 (en) 2015-10-28
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WO2008106398A3 (en) 2008-10-16
EP3002020B1 (en) 2019-07-10

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